Background
Currently, to develop the onboarding dialog for structured tasks, one needs to go through the process of selecting a task from the Homepage, be forwarded to VE, wait for the VE session to load, and then the onboarding shows up with one's local changes. On top of that there are issues with old javascript being stored in the browser by MediaWikis ResourceLoader system.
Acceptance Criteria
Create a new dev-entry point based, if possible on Vite's dev server, that allows loading the App.vue in modules/ext.growthExperiments.StructuredTask.PreEdit/App.vue and subcomponents required from within there. That dev-server should ideally also support Hot Module Replacement (HMR).